Add Transition A Branch From One Base To Another as a Git TIL

git/transition-a-branch-from-one-base-to-another.md

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+# Transition A Branch From One Base To Another
+
+Let's say I'm working in a git workflow where we have `main` as our production
+branch and `dev` as our development branch. I've opened a feature branch off of
+`main` and made a series of commits. It is at that point that I realize I
+should instead be branched off `dev`. I could open up a new branch off `dev`
+and then `cherry-pick` those commits. That is messier and more steps than
+necessary.
+
+Instead, I can transition the feature branch I'm already working from to a
+different base.
+
+The [`git-rebase`](https://git-scm.com/docs/git-rebase) command supports this
+with the `--onto` flag.
+
+```bash
+$ git rebase --onto dev main my-feature-branch
+```
+
+Specify the new base branch (`dev`), the current base (`main`), and then the
+name of the branch you are transitioning (`my-feature-branch`).
+
+[source](https://stackoverflow.com/a/10853956/535590)